8068

543 دكتري

دكتري

طراحي كاربردي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك

1392

چهارده،115ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

مصطفي غيور، محمود فرزين

غلامحسين لياقت

5/8/92

مجتبي محزون، مهران مرادي، حسين خدارحمي، عليرضا شهيدي

مهندسي مكانيك

ID543 دكتري

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Closed Form Models for Analyses of Asymmetric Shaped Charges and W Type Shaped Charges with Concentrated Jets Asghar Mahdian a mahdian@me iut ac ir May Department of Mechanical Engineering Isfahan University of Technology Isfahan Iran Mostafa Ghayour ghayour@cc iut ac ir Mahmoud Farzin farzin@cc iut ac ir Gholam Hossein Liaghat ghlia @modares ac ir Mohammad Reza Salimpour Department Graduate Program Coordinator ABSTRACT This thesis presents a closed form model for the analysis of the symmetric planar W type shaped charges WSC with asymmetric V sections In the symmetric planar WSC for two V sections two primary cores and two primary jets are produced If these two V sections have proper asymmetry these primary cores will force two primary jets into a secondary core which will be produced onto the axis of the whole symmetry of WSC For the analysis of such planar WSC a complete generalized model for the asymmetric planar V shaped charges VSC with any desired order of asymmetry is mandatory Some factors such as liner and confinement asymmetries detonation wave front asymmetries and other factors can effect these phenomena In such cases the velocities of the elements lying on the two arms of the liner in the asymmetric planar VSC may not be symmetric Thus elements colliding at the core will have different distances from the nominal axis of VSC symmetry and of course will not meet on this axis In this thesis by means of a model that explains the collapse and jet formation process in the VSC for any desired order of geometrical asymmetries secondary jet formation phenomenon in the symmetric WSC will be described In other words by presenting a closed form analysis of the WSC the secondary jet specifications can be easily evaluated and thus can be compared with respect to the jet quantities in symmetric or asymmetric VSC Finally for the primary and secondary jets the coherency conditions and their critical parameters are investigated and as a case study in a typical WSC these critical parameters are evaluated In the presence of proper asymmetry in such WSC s a jet with a greater rate of inlet mass and energy than conventional VSC s can be produced Keywords Secondary Jet formation theory W type shaped charge Collapse phenomenon Asymmetric shaped charge Assoc Prof Isfahan University of Technology Department of Mechanical Engineering Prof Isfahan University of Technology Department of Mechanical Engineering Prof Tarbiat Modares University Department of Mechanical Engineering PDF created with pdfFactory trial version www pdffactory com

مصطفي غيور، محمود فرزين

غلامحسين لياقت

مجتبي محزون، مهران مرادي، حسين خدارحمي، عليرضا شهيدي